Table 4-57
LEDs on the FMU board
LED
Color
Status
Meaning
RUN
Green
Blinking (on for 0.125s
and off for 0.125s)
The unit is functional but fails to
communicate with the BBU or upper-
level FMU.
Blinking (on for 1s and off
for 1s)
The unit is functional and is
communicating with the BBU or
upper-level FMU.
Off
There is no power supply, or the
module is faulty.
ALM
Red
Blinking (on for 1s and off
for 1s)
The module is reporting alarms.
Off
No alarm is generated.
describes the ports on the FMU board.
Table 4-58
Ports on the FMU board
Port Type
Label
Connector
Type
Description
Power port
-48 V
3V3 power
connector
The port is used to
introduce the -48 V DC
power supply.
Sensor port
SENSOR
RJ-45 connector
The port is connected to the
ELU.
Communicatio
n port
COM OUT
RJ-45 connector
The port is connected to the
lower-level FMU.
COM IN
RJ-45 connector
The port is connected to the
BBU or upper-level FMU.
4.9 GATM
The GSM Antenna and TMA control Module (GATM) controls the antenna and TMA.
Panel
shows the GATM panel.
Figure 4-45
GATM panel
BTS3900
Hardware Description
4 BTS3900 Components
Issue 04 (2011-02-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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